summaryrefslogtreecommitdiffstats
path: root/src/H5Opublic.h
blob: 59d117da4ba6655ec6ec0598be714796a58da62f (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
 * Copyright by the Board of Trustees of the University of Illinois.         *
 * All rights reserved.                                                      *
 *                                                                           *
 * This file is part of HDF5.  The full HDF5 copyright notice, including     *
 * terms governing use, modification, and redistribution, is contained in    *
 * the files COPYING and Copyright.html.  COPYING can be found at the root   *
 * of the source code distribution tree; Copyright.html can be found at the  *
 * root level of an installed copy of the electronic HDF5 document set and   *
 * is linked from the top-level documents page.  It can also be found at     *
 * http://hdf.ncsa.uiuc.edu/HDF5/doc/Copyright.html.  If you do not have     *
 * access to either file, you may request a copy from hdfhelp@ncsa.uiuc.edu. *
 * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */

/*-------------------------------------------------------------------------
 *
 * Created:             H5Oproto.h
 *                      Aug  5 1997
 *                      Robb Matzke <matzke@llnl.gov>
 *
 * Purpose:             Public declarations for the H5O (object header)
 *                      package.
 *
 * Modifications:
 *
 *-------------------------------------------------------------------------
 */
#ifndef _H5Opublic_H
#define _H5Opublic_H

/* Public headers needed by this file */
#include "H5public.h"

#ifdef __cplusplus
extern "C" {
#endif

#ifdef __cplusplus
}
#endif
#endif
='bug_f9fe90d0fa'>bug_f9fe90d0fa Tcl is a high-level, general-purpose, interpreted, dynamic programming language. It was designed with the goal of being very simple but powerful.
summaryrefslogtreecommitdiffstats
path: root/win/tclWin32Dll.c
blob: 2bccd073ca82570c6d6db91d10ca2bd5a2caeda7 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
/* 
 * tclWin32Dll.c --
 *
 *	This file contains the DLL entry point.
 *
 * Copyright (c) 1995-1996 Sun Microsystems, Inc.
 * Copyright (c) 1998-2000 Scriptics Corporation.
 *
 * See the file "license.terms" for information on usage and redistribution
 * of this file, and for a DISCLAIMER OF ALL WARRANTIES.
 *
 * RCS: @(#) $Id: tclWin32Dll.c,v 1.31 2003/12/26 04:12:16 mdejong Exp $
 */

#include "tclWinInt.h"

/*
 * The following data structures are used when loading the thunking 
 * library for execing child processes under Win32s.
 */

typedef DWORD (WINAPI UT32PROC)(LPVOID lpBuff, DWORD dwUserDefined,
	LPVOID *lpTranslationList);

typedef BOOL (WINAPI UTREGISTER)(HANDLE hModule, LPCSTR SixteenBitDLL,
	LPCSTR InitName, LPCSTR ProcName, UT32PROC **ThirtyTwoBitThunk,
	FARPROC UT32Callback, LPVOID Buff);

typedef VOID (WINAPI UTUNREGISTER)(HANDLE hModule);

/* 
 * The following variables keep track of information about this DLL
 * on a per-instance basis.  Each time this DLL is loaded, it gets its own 
 * new data segment with its own copy of all static and global information.
 */

static HINSTANCE hInstance;	/* HINSTANCE of this DLL. */
static int platformId;		/* Running under NT, or 95/98? */

#if defined(HAVE_NO_SEH) && defined(TCL_MEM_DEBUG)
static void *INITIAL_ESP,
            *INITIAL_EBP,
            *INITIAL_HANDLER,
            *RESTORED_ESP,
            *RESTORED_EBP,
            *RESTORED_HANDLER;
#endif /* HAVE_NO_SEH && TCL_MEM_DEBUG */

/*
 * The following function tables are used to dispatch to either the
 * wide-character or multi-byte versions of the operating system calls,
 * depending on whether the Unicode calls are available.
 */

static TclWinProcs asciiProcs = {
    0,

    (BOOL (WINAPI *)(CONST TCHAR *, LPDCB)) BuildCommDCBA,
    (TCHAR *(WINAPI *)(TCHAR *)) CharLowerA,
    (BOOL (WINAPI *)(CONST TCHAR *, CONST TCHAR *, BOOL)) CopyFileA,
    (BOOL (WINAPI *)(CONST TCHAR *, LPSECURITY_ATTRIBUTES)) CreateDirectoryA,
    (HANDLE (WINAPI *)(CONST TCHAR *, DWORD, DWORD, SECURITY_ATTRIBUTES *, 
	    DWORD, DWORD, HANDLE)) CreateFileA,
    (BOOL (WINAPI *)(CONST TCHAR *, TCHAR *, LPSECURITY_ATTRIBUTES, 
	    LPSECURITY_ATTRIBUTES, BOOL, DWORD, LPVOID, CONST TCHAR *, 
	    LPSTARTUPINFOA, LPPROCESS_INFORMATION)) CreateProcessA,
    (BOOL (WINAPI *)(CONST TCHAR *)) DeleteFileA,
    (HANDLE (WINAPI *)(CONST TCHAR *, WIN32_FIND_DATAT *)) FindFirstFileA,
    (BOOL (WINAPI *)(HANDLE, WIN32_FIND_DATAT *)) FindNextFileA,
    (BOOL (WINAPI *)(WCHAR *, LPDWORD)) GetComputerNameA,
    (DWORD (WINAPI *)(DWORD, WCHAR *)) GetCurrentDirectoryA,
    (DWORD (WINAPI *)(CONST TCHAR *)) GetFileAttributesA,
    (DWORD (WINAPI *)(CONST TCHAR *, DWORD nBufferLength, WCHAR *, 
	    TCHAR **)) GetFullPathNameA,
    (DWORD (WINAPI *)(HMODULE, WCHAR *, int)) GetModuleFileNameA,
    (DWORD (WINAPI *)(CONST TCHAR *, WCHAR *, DWORD)) GetShortPathNameA,
    (UINT (WINAPI *)(CONST TCHAR *, CONST TCHAR *, UINT uUnique, 
	    WCHAR *)) GetTempFileNameA,
    (DWORD (WINAPI *)(DWORD, WCHAR *)) GetTempPathA,
    (BOOL (WINAPI *)(CONST TCHAR *, WCHAR *, DWORD, LPDWORD, LPDWORD, LPDWORD,
	    WCHAR *, DWORD)) GetVolumeInformationA,
    (HINSTANCE (WINAPI *)(CONST TCHAR *)) LoadLibraryA,
    (TCHAR (WINAPI *)(WCHAR *, CONST TCHAR *)) lstrcpyA,
    (BOOL (WINAPI *)(CONST TCHAR *, CONST TCHAR *)) MoveFileA,
    (BOOL (WINAPI *)(CONST TCHAR *)) RemoveDirectoryA,
    (DWORD (WINAPI *)(CONST TCHAR *, CONST TCHAR *, CONST TCHAR *, DWORD, 
	    WCHAR *, TCHAR **)) SearchPathA,
    (BOOL (WINAPI *)(CONST TCHAR *)) SetCurrentDirectoryA,
    (BOOL (WINAPI *)(CONST TCHAR *, DWORD)) SetFileAttributesA,
    /* 
     * The three NULL function pointers will only be set when
     * Tcl_FindExecutable is called.  If you don't ever call that
     * function, the application will crash whenever WinTcl tries to call
     * functions through these null pointers.  That is not a bug in Tcl
     * -- Tcl_FindExecutable is obligatory in recent Tcl releases.
     */
    NULL,
    NULL,
    (int (__cdecl*)(CONST TCHAR *, struct _utimbuf *)) _utime,
    NULL,
    NULL,
    /* Security SDK - not available on 95,98,ME */
    NULL, NULL, NULL, NULL, NULL, NULL
};

static TclWinProcs unicodeProcs = {
    1,

    (BOOL (WINAPI *)(CONST TCHAR *, LPDCB)) BuildCommDCBW,
    (TCHAR *(WINAPI *)(TCHAR *)) CharLowerW,
    (BOOL (WINAPI *)(CONST TCHAR *, CONST TCHAR *, BOOL)) CopyFileW,
    (BOOL (WINAPI *)(CONST TCHAR *, LPSECURITY_ATTRIBUTES)) CreateDirectoryW,
    (HANDLE (WINAPI *)(CONST TCHAR *, DWORD, DWORD, SECURITY_ATTRIBUTES *, 
	    DWORD, DWORD, HANDLE)) CreateFileW,
    (BOOL (WINAPI *)(CONST TCHAR *, TCHAR *, LPSECURITY_ATTRIBUTES, 
	    LPSECURITY_ATTRIBUTES, BOOL, DWORD, LPVOID, CONST TCHAR *, 
	    LPSTARTUPINFOA, LPPROCESS_INFORMATION)) CreateProcessW,
    (BOOL (WINAPI *)(CONST TCHAR *)) DeleteFileW,
    (HANDLE (WINAPI *)(CONST TCHAR *, WIN32_FIND_DATAT *)) FindFirstFileW,
    (BOOL (WINAPI *)(HANDLE, WIN32_FIND_DATAT *)) FindNextFileW,
    (BOOL (WINAPI *)(WCHAR *, LPDWORD)) GetComputerNameW,
    (DWORD (WINAPI *)(DWORD, WCHAR *)) GetCurrentDirectoryW,
    (DWORD (WINAPI *)(CONST TCHAR *)) GetFileAttributesW,
    (DWORD (WINAPI *)(CONST TCHAR *, DWORD nBufferLength, WCHAR *, 
	    TCHAR **)) GetFullPathNameW,
    (DWORD (WINAPI *)(HMODULE, WCHAR *, int)) GetModuleFileNameW,
    (DWORD (WINAPI *)(CONST TCHAR *, WCHAR *, DWORD)) GetShortPathNameW,
    (UINT (WINAPI *)(CONST TCHAR *, CONST TCHAR *, UINT uUnique, 
	    WCHAR *)) GetTempFileNameW,
    (DWORD (WINAPI *)(DWORD, WCHAR *)) GetTempPathW,
    (BOOL (WINAPI *)(CONST TCHAR *, WCHAR *, DWORD, LPDWORD, LPDWORD, LPDWORD, 
	    WCHAR *, DWORD)) GetVolumeInformationW,
    (HINSTANCE (WINAPI *)(CONST TCHAR *)) LoadLibraryW,
    (TCHAR (WINAPI *)(WCHAR *, CONST TCHAR *)) lstrcpyW,
    (BOOL (WINAPI *)(CONST TCHAR *, CONST TCHAR *)) MoveFileW,
    (BOOL (WINAPI *)(CONST TCHAR *)) RemoveDirectoryW,
    (DWORD (WINAPI *)(CONST TCHAR *, CONST TCHAR *, CONST TCHAR *, DWORD, 
	    WCHAR *, TCHAR **)) SearchPathW,
    (BOOL (WINAPI *)(CONST TCHAR *)) SetCurrentDirectoryW,
    (BOOL (WINAPI *)(CONST TCHAR *, DWORD)) SetFileAttributesW,
    /* 
     * The three NULL function pointers will only be set when
     * Tcl_FindExecutable is called.  If you don't ever call that
     * function, the application will crash whenever WinTcl tries to call
     * functions through these null pointers.  That is not a bug in Tcl
     * -- Tcl_FindExecutable is obligatory in recent Tcl releases.
     */
    NULL,
    NULL,
    (int (__cdecl*)(CONST TCHAR *, struct _utimbuf *)) _wutime,
    NULL,
    NULL,
    /* Security SDK - will be filled in on NT,XP,2000,2003 */
    NULL, NULL, NULL, NULL, NULL, NULL
};

TclWinProcs *tclWinProcs;
static Tcl_Encoding tclWinTCharEncoding;

/*
 * The following declaration is for the VC++ DLL entry point.
 */

BOOL APIENTRY		DllMain(HINSTANCE hInst, DWORD reason, 
				LPVOID reserved);

/*
 * The following structure and linked list is to allow us to map between
 * volume mount points and drive letters on the fly (no Win API exists
 * for this).
 */
typedef struct MountPointMap {
    CONST WCHAR* volumeName;       /* Native wide string volume name */
    char driveLetter;              /* Drive letter corresponding to
                                    * the volume name. */
    struct MountPointMap* nextPtr; /* Pointer to next structure in list,
                                    * or NULL */
} MountPointMap;

/* 
 * This is the head of the linked list, which is protected by the
 * mutex which follows, for thread-enabled builds.
 */
MountPointMap *driveLetterLookup = NULL;
TCL_DECLARE_MUTEX(mountPointMap)

/* We will need this below */
extern Tcl_FSDupInternalRepProc TclNativeDupInternalRep;

#ifdef __WIN32__
#ifndef STATIC_BUILD


/*
 *----------------------------------------------------------------------
 *
 * DllEntryPoint --
 *
 *	This wrapper function is used by Borland to invoke the
 *	initialization code for Tcl.  It simply calls the DllMain
 *	routine.
 *
 * Results:
 *	See DllMain.
 *
 * Side effects:
 *	See DllMain.
 *
 *----------------------------------------------------------------------
 */

BOOL APIENTRY
DllEntryPoint(hInst, reason, reserved)
    HINSTANCE hInst;		/* Library instance handle. */
    DWORD reason;		/* Reason this function is being called. */
    LPVOID reserved;		/* Not used. */
{
    return DllMain(hInst, reason, reserved);
}

/*
 *----------------------------------------------------------------------
 *
 * DllMain --
 *
 *	This routine is called by the VC++ C run time library init
 *	code, or the DllEntryPoint routine.  It is responsible for
 *	initializing various dynamically loaded libraries.
 *
 * Results:
 *	TRUE on sucess, FALSE on failure.
 *
 * Side effects:
 *	Establishes 32-to-16 bit thunk and initializes sockets library.
 *	This might call some sycronization functions, but MSDN
 *	documentation states: "Waiting on synchronization objects in
 *	DllMain can cause a deadlock."
 *
 *----------------------------------------------------------------------
 */
BOOL APIENTRY
DllMain(hInst, reason, reserved)
    HINSTANCE hInst;		/* Library instance handle. */
    DWORD reason;		/* Reason this function is being called. */
    LPVOID reserved;		/* Not used. */
{
    switch (reason) {
    case DLL_PROCESS_ATTACH:
	TclWinInit(hInst);
	return TRUE;

    case DLL_PROCESS_DETACH:
	/*
	 * Protect the call to Tcl_Finalize.  The OS could be unloading
	 * us from an exception handler and the state of the stack might
	 * be unstable.
	 */
#ifdef HAVE_NO_SEH
# ifdef TCL_MEM_DEBUG
    __asm__ __volatile__ (
            "movl %%esp,  %0" "\n\t"
            "movl %%ebp,  %1" "\n\t"
            "movl %%fs:0, %2" "\n\t"
            : "=m"(INITIAL_ESP),
              "=m"(INITIAL_EBP),
              "=r"(INITIAL_HANDLER) );
# endif /* TCL_MEM_DEBUG */

    __asm__ __volatile__ (
            "pushl %ebp" "\n\t"
            "pushl $__except_dllmain_detach_handler" "\n\t"
            "pushl %fs:0" "\n\t"
            "movl  %esp, %fs:0");
#else
	__try {
#endif /* HAVE_NO_SEH */
  	    Tcl_Finalize();
#ifdef HAVE_NO_SEH
    __asm__ __volatile__ (
            "jmp  dllmain_detach_pop" "\n"
        "dllmain_detach_reentry:" "\n\t"
            "movl %%fs:0, %%eax" "\n\t"
            "movl 0x8(%%eax), %%esp" "\n\t"
            "movl 0x8(%%esp), %%ebp" "\n"
        "dllmain_detach_pop:" "\n\t"
            "movl (%%esp), %%eax" "\n\t"
            "movl %%eax, %%fs:0" "\n\t"
            "add  $12, %%esp" "\n\t"
            :
            :
            : "%eax");

# ifdef TCL_MEM_DEBUG
    __asm__ __volatile__ (
            "movl  %%esp,  %0" "\n\t"
            "movl  %%ebp,  %1" "\n\t"
            "movl  %%fs:0, %2" "\n\t"
            : "=m"(RESTORED_ESP),
              "=m"(RESTORED_EBP),
              "=r"(RESTORED_HANDLER) );

    if (INITIAL_ESP != RESTORED_ESP)
        Tcl_Panic("ESP restored incorrectly");
    if (INITIAL_EBP != RESTORED_EBP)
        Tcl_Panic("EBP restored incorrectly");
    if (INITIAL_HANDLER != RESTORED_HANDLER)
        Tcl_Panic("HANDLER restored incorrectly");
# endif /* TCL_MEM_DEBUG */
#else
	} __except (EXCEPTION_EXECUTE_HANDLER) {
	    /* empty handler body. */
	}
#endif /* HAVE_NO_SEH */
	break;
    }

    return TRUE; 
}

#ifdef HAVE_NO_SEH
static
__attribute__ ((cdecl))
EXCEPTION_DISPOSITION
_except_dllmain_detach_handler(
    struct _EXCEPTION_RECORD *ExceptionRecord,
    void *EstablisherFrame,
    struct _CONTEXT *ContextRecord,
    void *DispatcherContext)
{
    __asm__ __volatile__ (
            "jmp dllmain_detach_reentry");
    /* Nuke compiler warning about unused static function */
    _except_dllmain_detach_handler(NULL, NULL, NULL, NULL);
    return 0; /* Function does not return */
}
#endif /* HAVE_NO_SEH */

#endif /* !STATIC_BUILD */
#endif /* __WIN32__ */

/*
 *----------------------------------------------------------------------
 *
 * TclWinGetTclInstance --
 *
 *	Retrieves the global library instance handle.
 *
 * Results:
 *	Returns the global library instance handle.
 *
 * Side effects:
 *	None.
 *
 *----------------------------------------------------------------------
 */

HINSTANCE
TclWinGetTclInstance()
{
    return hInstance;
}

/*
 *----------------------------------------------------------------------
 *
 * TclWinInit --
 *
 *	This function initializes the internal state of the tcl library.
 *
 * Results:
 *	None.
 *
 * Side effects:
 *	Initializes the tclPlatformId variable.
 *
 *----------------------------------------------------------------------
 */

void
TclWinInit(hInst)
    HINSTANCE hInst;		/* Library instance handle. */
{
    OSVERSIONINFO os;

    hInstance = hInst;
    os.dwOSVersionInfoSize = sizeof(OSVERSIONINFO);
    GetVersionEx(&os);
    platformId = os.dwPlatformId;

    /*
     * We no longer support Win32s, so just in case someone manages to
     * get a runtime there, make sure they know that.
     */

    if (platformId == VER_PLATFORM_WIN32s) {
	Tcl_Panic("Win32s is not a supported platform");	
    }

    tclWinProcs = &asciiProcs;
}

/*
 *----------------------------------------------------------------------
 *
 * TclWinGetPlatformId --
 *
 *	Determines whether running under NT, 95, or Win32s, to allow 
 *	runtime conditional code.
 *
 * Results:
 *	The return value is one of:
 *	    VER_PLATFORM_WIN32s		Win32s on Windows 3.1. (not supported)
 *	    VER_PLATFORM_WIN32_WINDOWS	Win32 on Windows 95, 98, ME.
 *	    VER_PLATFORM_WIN32_NT	Win32 on Windows NT, 2000, XP
 *
 * Side effects:
 *	None.
 *
 *----------------------------------------------------------------------
 */

int		
TclWinGetPlatformId()
{
    return platformId;
}

/*
 *-------------------------------------------------------------------------
 *
 * TclWinNoBackslash --
 *
 *	We're always iterating through a string in Windows, changing the
 *	backslashes to slashes for use in Tcl.
 *
 * Results:
 *	All backslashes in given string are changed to slashes.
 *
 * Side effects:
 *	None.
 *
 *-------------------------------------------------------------------------
 */

char *
TclWinNoBackslash(
    char *path)			/* String to change. */
{
    char *p;

    for (p = path; *p != '\0'; p++) {
	if (*p == '\\') {
	    *p = '/';
	}
    }
    return path;
}

/*
 *----------------------------------------------------------------------
 *
 * TclpCheckStackSpace --
 *
 *	Detect if we are about to blow the stack.  Called before an 
 *	evaluation can happen when nesting depth is checked.
 *
 * Results:
 *	1 if there is enough stack space to continue; 0 if not.
 *
 * Side effects:
 *	None.
 *
 *----------------------------------------------------------------------
 */

int
TclpCheckStackSpace()
{
    int retval = 0;

    /*
     * We can recurse only if there is at least TCL_WIN_STACK_THRESHOLD
     * bytes of stack space left.  alloca() is cheap on windows; basically
     * it just subtracts from the stack pointer causing the OS to throw an
     * exception if the stack pointer is set below the bottom of the stack.
     */

#ifdef HAVE_NO_SEH
# ifdef TCL_MEM_DEBUG
    __asm__ __volatile__ (
            "movl %%esp,  %0" "\n\t"
            "movl %%ebp,  %1" "\n\t"
            "movl %%fs:0, %2" "\n\t"
            : "=m"(INITIAL_ESP),
              "=m"(INITIAL_EBP),
              "=r"(INITIAL_HANDLER) );
# endif /* TCL_MEM_DEBUG */

    __asm__ __volatile__ (
            "pushl %ebp" "\n\t"
            "pushl $__except_checkstackspace_handler" "\n\t"
            "pushl %fs:0" "\n\t"
            "movl  %esp, %fs:0");
#else
    __try {
#endif /* HAVE_NO_SEH */
#ifdef HAVE_ALLOCA_GCC_INLINE
    __asm__ __volatile__ (
            "movl  %0, %%eax" "\n\t"
            "call  __alloca" "\n\t"
            :
            : "i"(TCL_WIN_STACK_THRESHOLD)
            : "%eax");
#else
	alloca(TCL_WIN_STACK_THRESHOLD);
#endif /* HAVE_ALLOCA_GCC_INLINE */
	retval = 1;
#ifdef HAVE_NO_SEH
    __asm__ __volatile__ (
            "movl %%fs:0, %%esp" "\n\t"
            "jmp  checkstackspace_pop" "\n"
        "checkstackspace_reentry:" "\n\t"
            "movl %%fs:0, %%eax" "\n\t"
            "movl 0x8(%%eax), %%esp" "\n\t"
            "movl 0x8(%%esp), %%ebp" "\n"
        "checkstackspace_pop:" "\n\t"
            "movl (%%esp), %%eax" "\n\t"
            "movl %%eax, %%fs:0" "\n\t"
            "add  $12, %%esp" "\n\t"
            :
            :
            : "%eax");

# ifdef TCL_MEM_DEBUG
    __asm__ __volatile__ (
            "movl  %%esp,  %0" "\n\t"
            "movl  %%ebp,  %1" "\n\t"
            "movl  %%fs:0, %2" "\n\t"
            : "=m"(RESTORED_ESP),
              "=m"(RESTORED_EBP),
              "=r"(RESTORED_HANDLER) );

    if (INITIAL_ESP != RESTORED_ESP)
        Tcl_Panic("ESP restored incorrectly");
    if (INITIAL_EBP != RESTORED_EBP)
        Tcl_Panic("EBP restored incorrectly");
    if (INITIAL_HANDLER != RESTORED_HANDLER)
        Tcl_Panic("HANDLER restored incorrectly");
# endif /* TCL_MEM_DEBUG */
#else
    } __except (EXCEPTION_EXECUTE_HANDLER) {}
#endif /* HAVE_NO_SEH */

    /*
     * Avoid using control flow statements in the SEH guarded block!
     */
    return retval;
}
#ifdef HAVE_NO_SEH
static
__attribute__ ((cdecl))
EXCEPTION_DISPOSITION
_except_checkstackspace_handler(
    struct _EXCEPTION_RECORD *ExceptionRecord,
    void *EstablisherFrame,
    struct _CONTEXT *ContextRecord,
    void *DispatcherContext)
{
    __asm__ __volatile__ (
            "jmp checkstackspace_reentry");
    /* Nuke compiler warning about unused static function */
    _except_checkstackspace_handler(NULL, NULL, NULL, NULL);
    return 0; /* Function does not return */
}
#endif /* HAVE_NO_SEH */

/*
 *----------------------------------------------------------------------
 *
 * TclWinGetPlatform --
 *
 *	This is a kludge that allows the test library to get access
 *	the internal tclPlatform variable.
 *
 * Results:
 *	Returns a pointer to the tclPlatform variable.
 *
 * Side effects:
 *	None.
 *
 *----------------------------------------------------------------------
 */

TclPlatformType *
TclWinGetPlatform()
{
    return &tclPlatform;
}

/*
 *---------------------------------------------------------------------------
 *
 * TclWinSetInterfaces --
 *
 *	A helper proc that allows the test library to change the
 *	tclWinProcs structure to dispatch to either the wide-character
 *	or multi-byte versions of the operating system calls, depending
 *	on whether Unicode is the system encoding.
 *	
 *	As well as this, we can also try to load in some additional
 *	procs which may/may not be present depending on the current
 *	Windows version (e.g. Win95 will not have the procs below).
 *
 * Results:
 *	None.
 *
 * Side effects:
 *	None.
 *
 *---------------------------------------------------------------------------
 */

void
TclWinSetInterfaces(
    int wide)			/* Non-zero to use wide interfaces, 0
				 * otherwise. */
{
    Tcl_FreeEncoding(tclWinTCharEncoding);

    if (wide) {
	tclWinProcs = &unicodeProcs;
	tclWinTCharEncoding = Tcl_GetEncoding(NULL, "unicode");
	if (tclWinProcs->getFileAttributesExProc == NULL) {
	    HINSTANCE hInstance = LoadLibraryA("kernel32");
	    if (hInstance != NULL) {
	        tclWinProcs->getFileAttributesExProc = 
		  (BOOL (WINAPI *)(CONST TCHAR *, GET_FILEEX_INFO_LEVELS, 
		  LPVOID)) GetProcAddress(hInstance, "GetFileAttributesExW");
		tclWinProcs->createHardLinkProc = 
		  (BOOL (WINAPI *)(CONST TCHAR *, CONST TCHAR*, 
		  LPSECURITY_ATTRIBUTES)) GetProcAddress(hInstance, 
		  "CreateHardLinkW");
	        tclWinProcs->findFirstFileExProc = 
		  (HANDLE (WINAPI *)(CONST TCHAR*, UINT,
		  LPVOID, UINT, LPVOID, DWORD)) GetProcAddress(hInstance, 
		  "FindFirstFileExW");
	        tclWinProcs->getVolumeNameForVMPProc = 
		  (BOOL (WINAPI *)(CONST TCHAR*, TCHAR*, 
		  DWORD)) GetProcAddress(hInstance, 
		  "GetVolumeNameForVolumeMountPointW");
		FreeLibrary(hInstance);
	    }
	    hInstance = LoadLibraryA("advapi32");
	    if (hInstance != NULL) {
		tclWinProcs->getFileSecurityProc = (BOOL (WINAPI *)(
		  LPCTSTR lpFileName, 
		  SECURITY_INFORMATION RequestedInformation,
		  PSECURITY_DESCRIPTOR pSecurityDescriptor, DWORD nLength, 
		  LPDWORD lpnLengthNeeded)) GetProcAddress(hInstance, 
							   "GetFileSecurityW"); 
		tclWinProcs->impersonateSelfProc = (BOOL (WINAPI *) (
		  SECURITY_IMPERSONATION_LEVEL ImpersonationLevel)) 
		  GetProcAddress(hInstance, "ImpersonateSelf");
		tclWinProcs->openThreadTokenProc = (BOOL (WINAPI *) (
		  HANDLE ThreadHandle, DWORD DesiredAccess, BOOL OpenAsSelf,
		  PHANDLE TokenHandle)) GetProcAddress(hInstance, 
						       "OpenThreadToken");
		tclWinProcs->revertToSelfProc = (BOOL (WINAPI *) (void)) 
		  GetProcAddress(hInstance, "RevertToSelf");
		tclWinProcs->mapGenericMaskProc = (VOID (WINAPI *) (
		  PDWORD AccessMask, PGENERIC_MAPPING GenericMapping)) 
		  GetProcAddress(hInstance, "MapGenericMask");
		tclWinProcs->accessCheckProc = (BOOL (WINAPI *)(
		  PSECURITY_DESCRIPTOR pSecurityDescriptor, 
	          HANDLE ClientToken, DWORD DesiredAccess,
	          PGENERIC_MAPPING GenericMapping,
		  PPRIVILEGE_SET PrivilegeSet,
		  LPDWORD PrivilegeSetLength,
		  LPDWORD GrantedAccess,
		  LPBOOL AccessStatus)) GetProcAddress(hInstance, 
		  "AccessCheck");
		FreeLibrary(hInstance);
	    }
	}
    } else {
	tclWinProcs = &asciiProcs;
	tclWinTCharEncoding = NULL;
	if (tclWinProcs->getFileAttributesExProc == NULL) {
	    HINSTANCE hInstance = LoadLibraryA("kernel32");
	    if (hInstance != NULL) {
		tclWinProcs->getFileAttributesExProc = 
		  (BOOL (WINAPI *)(CONST TCHAR *, GET_FILEEX_INFO_LEVELS, 
		  LPVOID)) GetProcAddress(hInstance, "GetFileAttributesExA");
		tclWinProcs->createHardLinkProc = 
		  (BOOL (WINAPI *)(CONST TCHAR *, CONST TCHAR*, 
		  LPSECURITY_ATTRIBUTES)) GetProcAddress(hInstance, 
		  "CreateHardLinkA");
		tclWinProcs->findFirstFileExProc = NULL;
		/*
		 * The 'findFirstFileExProc' function exists on some
		 * of 95/98/ME, but it seems not to work as anticipated.
		 * Therefore we don't set this function pointer.  The
		 * relevant code will fall back on a slower approach
		 * using the normal findFirstFileProc.
		 * 
		 * (HANDLE (WINAPI *)(CONST TCHAR*, UINT,
		 * LPVOID, UINT, LPVOID, DWORD)) GetProcAddress(hInstance, 
		 * "FindFirstFileExA");
		 */
		tclWinProcs->getVolumeNameForVMPProc = 
		  (BOOL (WINAPI *)(CONST TCHAR*, TCHAR*, 
		  DWORD)) GetProcAddress(hInstance, 
		  "GetVolumeNameForVolumeMountPointA");
		FreeLibrary(hInstance);
	    }
	}
    }
}

/*
 *---------------------------------------------------------------------------
 *
 * TclWinResetInterfaceEncodings --
 *
 *	Called during finalization to free up any encodings we use.
 *	The tclWinProcs-> look up table is still ok to use after
 *	this call, provided no encoding conversion is required.
 *
 *      We also clean up any memory allocated in our mount point
 *      map which is used to follow certain kinds of symlinks.
 *      That code should never be used once encodings are taken
 *      down.
 *      
 * Results:
 *	None.
 *
 * Side effects:
 *	None.
 *
 *---------------------------------------------------------------------------
 */
void
TclWinResetInterfaceEncodings()
{
    MountPointMap *dlIter, *dlIter2;
    if (tclWinTCharEncoding != NULL) {
	Tcl_FreeEncoding(tclWinTCharEncoding);
	tclWinTCharEncoding = NULL;
    }
    /* Clean up the mount point map */
    Tcl_MutexLock(&mountPointMap);
    dlIter = driveLetterLookup; 
    while (dlIter != NULL) {
	dlIter2 = dlIter->nextPtr;
	ckfree((char*)dlIter->volumeName);
	ckfree((char*)dlIter);
	dlIter = dlIter2;
    }
    Tcl_MutexUnlock(&mountPointMap);
}

/*
 *---------------------------------------------------------------------------
 *
 * TclWinResetInterfaces --
 *
 *	Called during finalization to reset us to a safe state for reuse.
 *	After this call, it is best not to use the tclWinProcs-> look
 *	up table since it is likely to be different to what is expected.
 *
 * Results:
 *	None.
 *
 * Side effects:
 *	None.
 *
 *---------------------------------------------------------------------------
 */
void
TclWinResetInterfaces()
{
    tclWinProcs = &asciiProcs;
}

/*
 *--------------------------------------------------------------------
 *
 * TclWinDriveLetterForVolMountPoint
 *
 * Unfortunately, Windows provides no easy way at all to get hold
 * of the drive letter for a volume mount point, but we need that
 * information to understand paths correctly.  So, we have to 
 * build an associated array to find these correctly, and allow
 * quick and easy lookup from volume mount points to drive letters.
 * 
 * We assume here that we are running on a system for which the wide
 * character interfaces are used, which is valid for Win 2000 and WinXP
 * which are the only systems on which this function will ever be called.
 * 
 * Result: the drive letter, or -1 if no drive letter corresponds to
 * the given mount point.
 * 
 *--------------------------------------------------------------------
 */
char 
TclWinDriveLetterForVolMountPoint(CONST WCHAR *mountPoint)
{
    MountPointMap *dlIter, *dlPtr2;
    WCHAR Target[55];         /* Target of mount at mount point */
    WCHAR drive[4] = { L'A', L':', L'\\', L'\0' };
    
    /* 
     * Detect the volume mounted there.  Unfortunately, there is no
     * simple way to map a unique volume name to a DOS drive letter.  
     * So, we have to build an associative array.
     */
    
    Tcl_MutexLock(&mountPointMap);
    dlIter = driveLetterLookup; 
    while (dlIter != NULL) {
	if (wcscmp(dlIter->volumeName, mountPoint) == 0) {
	    /* 
	     * We need to check whether this information is
	     * still valid, since either the user or various
	     * programs could have adjusted the mount points on
	     * the fly.
	     */
	    drive[0] = L'A' + (dlIter->driveLetter - 'A');
	    /* Try to read the volume mount point and see where it points */
	    if ((*tclWinProcs->getVolumeNameForVMPProc)((TCHAR*)drive, 
					       (TCHAR*)Target, 55) != 0) {
		if (wcscmp((WCHAR*)dlIter->volumeName, Target) == 0) {
		    /* Nothing has changed */
		    Tcl_MutexUnlock(&mountPointMap);
		    return dlIter->driveLetter;
		}
	    }
	    /* 
	     * If we reach here, unfortunately, this mount point is
	     * no longer valid at all
	     */
	    if (driveLetterLookup == dlIter) {
		dlPtr2 = dlIter;
		driveLetterLookup = dlIter->nextPtr;
	    } else {
		for (dlPtr2 = driveLetterLookup; 
		     dlPtr2 != NULL; dlPtr2 = dlPtr2->nextPtr) {
		    if (dlPtr2->nextPtr == dlIter) {
			dlPtr2->nextPtr = dlIter->nextPtr;
			dlPtr2 = dlIter;
			break;
		    }
		}
	    }
	    /* Now dlPtr2 points to the structure to free */
	    ckfree((char*)dlPtr2->volumeName);
	    ckfree((char*)dlPtr2);
	    /* 
	     * Restart the loop --- we could try to be clever
	     * and continue half way through, but the logic is a 
	     * bit messy, so it's cleanest just to restart
	     */
	    dlIter = driveLetterLookup;
	    continue;
	}
	dlIter = dlIter->nextPtr;
    }
   
    /* We couldn't find it, so we must iterate over the letters */
    
    for (drive[0] = L'A'; drive[0] <= L'Z'; drive[0]++) {
	/* Try to read the volume mount point and see where it points */
	if ((*tclWinProcs->getVolumeNameForVMPProc)((TCHAR*)drive, 
					   (TCHAR*)Target, 55) != 0) {
	    int alreadyStored = 0;
	    for (dlIter = driveLetterLookup; dlIter != NULL; 
		 dlIter = dlIter->nextPtr) {
		if (wcscmp((WCHAR*)dlIter->volumeName, Target) == 0) {
		    alreadyStored = 1;
		    break;
		}
	    }
	    if (!alreadyStored) {
		dlPtr2 = (MountPointMap*) ckalloc(sizeof(MountPointMap));
		dlPtr2->volumeName = TclNativeDupInternalRep(Target);
		dlPtr2->driveLetter = 'A' + (drive[0] - L'A');
		dlPtr2->nextPtr = driveLetterLookup;
		driveLetterLookup  = dlPtr2;
	    }
	}
    }
    /* Try again */
    for (dlIter = driveLetterLookup; dlIter != NULL; 
					dlIter = dlIter->nextPtr) {
	if (wcscmp(dlIter->volumeName, mountPoint) == 0) {
	    Tcl_MutexUnlock(&mountPointMap);
	    return dlIter->driveLetter;
	}
    }
    /* 
     * The volume doesn't appear to correspond to a drive letter -- we
     * remember that fact and store '-1' so we don't have to look it
     * up each time.
     */
    dlPtr2 = (MountPointMap*) ckalloc(sizeof(MountPointMap));
    dlPtr2->volumeName = TclNativeDupInternalRep((ClientData)mountPoint);
    dlPtr2->driveLetter = -1;
    dlPtr2->nextPtr = driveLetterLookup;
    driveLetterLookup  = dlPtr2;
    Tcl_MutexUnlock(&mountPointMap);
    return -1;
}

/*
 *---------------------------------------------------------------------------
 *
 * Tcl_WinUtfToTChar, Tcl_WinTCharToUtf --
 *
 *	Convert between UTF-8 and Unicode when running Windows NT or 
 *	the current ANSI code page when running Windows 95.
 *
 *	On Mac, Unix, and Windows 95, all strings exchanged between Tcl
 *	and the OS are "char" oriented.  We need only one Tcl_Encoding to
 *	convert between UTF-8 and the system's native encoding.  We use
 *	NULL to represent that encoding.
 *
 *	On NT, some strings exchanged between Tcl and the OS are "char"
 *	oriented, while others are in Unicode.  We need two Tcl_Encoding
 *	APIs depending on whether we are targeting a "char" or Unicode
 *	interface.  
 *
 *	Calling Tcl_UtfToExternal() or Tcl_ExternalToUtf() with an
 *	encoding of NULL should always used to convert between UTF-8
 *	and the system's "char" oriented encoding.  The following two
 *	functions are used in Windows-specific code to convert between
 *	UTF-8 and Unicode strings (NT) or "char" strings(95).  This saves
 *	you the trouble of writing the following type of fragment over and
 *	over:
 *
 *		if (running NT) {
 *		    encoding <- Tcl_GetEncoding("unicode");
 *		    nativeBuffer <- UtfToExternal(encoding, utfBuffer);
 *		    Tcl_FreeEncoding(encoding);
 *		} else {
 *		    nativeBuffer <- UtfToExternal(NULL, utfBuffer);
 *		}
 *
 *	By convention, in Windows a TCHAR is a character in the ANSI code
 *	page on Windows 95, a Unicode character on Windows NT.  If you
 *	plan on targeting a Unicode interfaces when running on NT and a
 *	"char" oriented interface while running on 95, these functions
 *	should be used.  If you plan on targetting the same "char"
 *	oriented function on both 95 and NT, use Tcl_UtfToExternal()
 *	with an encoding of NULL.
 *
 * Results:
 *	The result is a pointer to the string in the desired target
 *	encoding.  Storage for the result string is allocated in
 *	dsPtr; the caller must call Tcl_DStringFree() when the result
 *	is no longer needed.
 *
 * Side effects:
 *	None.
 *
 *---------------------------------------------------------------------------
 */

TCHAR *
Tcl_WinUtfToTChar(string, len, dsPtr)
    CONST char *string;		/* Source string in UTF-8. */
    int len;			/* Source string length in bytes, or < 0 for
				 * strlen(). */
    Tcl_DString *dsPtr;		/* Uninitialized or free DString in which 
				 * the converted string is stored. */
{
    return (TCHAR *) Tcl_UtfToExternalDString(tclWinTCharEncoding, 
	    string, len, dsPtr);
}

char *
Tcl_WinTCharToUtf(string, len, dsPtr)
    CONST TCHAR *string;	/* Source string in Unicode when running
				 * NT, ANSI when running 95. */
    int len;			/* Source string length in bytes, or < 0 for
				 * platform-specific string length. */
    Tcl_DString *dsPtr;		/* Uninitialized or free DString in which 
				 * the converted string is stored. */
{
    return Tcl_ExternalToUtfDString(tclWinTCharEncoding, 
	    (CONST char *) string, len, dsPtr);
}